Alleged (1974-2000) was a champion American-bred Thoroughbred racehorse best remembered as winning back-to-back Prix de l'Arc de Triomphes in 1977 and 1978. Trained by Vincent O'Brien in Ireland and ridden by Lester Piggott, this front-running horse was undefeated in all but one of his appearances, that being second to Dunfermline in the 1977 St. Leger Stakes.